Answer this question truthfully
### Question: What causes Sexually transmitted disease?
### Response: Both bacteria and viruses may cause urethritis. The same bacteria that cause this condition are E. coli, chlamydia, gonorrhea. These bacteria also cause urinary tract infections and some sexually transmitted diseases. Viral causes are herpes simplex virus and cytomegalovirus.
Other causes include:
Injury Sensitivity to the chemicals used in spermicides or contraceptive jellies, or foams Sometimes the cause is unknown.